Notices
chessgator is free software under the GNU Affero General Public License v3.0 or later. The source is the public repository for this site. The engines and model below keep their own licenses.
Stockfish
Coaching analysis uses Stockfish 18 (lite single-thread WASM) from stockfish.js, licensed under the GNU GPL v3.0. Upstream engine: official-stockfish/Stockfish.
Maia
The opponent is a browser export of Maia3 5M, licensed under the GNU AGPL v3.0. ONNX export: bqrio/maia3-onnx. Upstream: CSSLab/maia3.
Lichess chess-openings
Opening names, ECO codes, and move orders on /openings come from the Lichess chess-openings dataset, dedicated to the public domain under CC0.
ONNX Runtime
Maia runs on ONNX Runtime Web (MIT).